Damper-regulator.



PATENTED DEC. 12, 1905.

W. A. MURRAY.

DAMPER REGULATOR.

APPLICATION nun NOV. 8, 1904.

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No. 807,393. PATENTED DEG.,12, 1905.

w. A. MURRAY. DAMPER REGULATOR.

APPLICATION FILED NOV. 8, 1804.

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UNITED STATES WILLIAM A. MURRAY, OF BALTIMORE, MARYLAND.

DAMPER-REGULATOR.

Specification of Letters Patent.

Patented Dec. 12, 1905.

Application filed November 8, 1904. Serial No.231,86l.

To all whom it may concern:

Be it known that I, WILLIAM A. MURRAY, a citizen of the United States, residing at Baltimore, in the State of Maryland, have invented certain new and useful Improvements in Damper-Regulators, of which the following is a specification.

This invention relates to improvements in damper-regulators.

One object is to improve and simplify the construction of damper regulators and to broaden their field of usefulness by providing a device which may be operated by steampressure alone or by steam and water.

Another object of the invention is to provide an improved construction and arrangement of motor and valve device which will be rigidly secured together and avoid the numerous pipe connections and the trouble incident to the fitting of the same together.

Other objects and advantages will be hereinafter pointed out.

The invention is illustrated in the accompanying drawings, in which Figure 1 illustrates a side elevation of the improved apparatus; Fig. 2, an end elevation of the same; Fig. 3, a top plan view of the same. Fig. 1 illustrates a sectional detail of the pendent end of the rod for carrying the pressure-regulating weights. Fig. 5 illustrates a vertical section through the valvecasing and motor-chamber, taken on the line 5 5 of Fig. 3. Fig. 6 is a sectional elevation through the primary motor and diaphragmand the passages leading thereto. Fig. 7 is a detail of the valve-seat and ports at the side Fig. 8 illustrates a detail view of the valve-stem, and Fig. 9 shows two views of the pivoted valve-stem connections. Fig. 10 shows a face view of the valve-casing ports.

In the drawings 1 designates a bracket on which a motor-cylinder 2 is supported. In the present instance the cylinder extends vertically above the bracket and at its upper end boss 7, which serves to thicken th e wall of the cylinder at that side in order that the longitudinal passages 8 and 9 may be formed in the cylinder-wall. The lower end of the passage 8 opens into the lower end of the piston chamber 5, while the upper end of said passage curves outwardly and opens through a valve-seat 10 on the exterior of the cylinder. The passage 9 opens into the upper end of the piston-chamber 5, While its lower end curves outwardly and terminates at the outer side of the valve-seat 10 above the passage 8, as clearly seen in Fig. 7. A valve-casing 11 has a face-plate 12, which seats against the valve-seat 10 on the side of the cylinder 2, and said casing is provided with a bore 13 extending vertically therethrough, which receives a metallic bushing 14, having a central valve-chamber 15. bushing is provided at the side adjacent the cylinder with ports 16 and 17, which open from the valve-chamber into passages 18 and 19 in the valve-casing, and these latter passages communicate, respectively,with the passages 8 and 9 in the cylinder-wall. The bushing is also provided with ports 20 and 21 leading from the valve-chamber and in line with the ports 16 and 17, but located respectively below and above the latter. These ports 20 and 21 are exhaust'ports, while the ports 16 and 17 are each alternately inlet and exhaust ports for the motor-passages 8 and 9.

Beneath the port 20 the bushing is provided with a drain-port 22, which communicates with the port 20 by a short passage 23, into which any water that may drip to the bottom of the valve-chamber may pass as. it is displaced by the valve when the latter descends. The lower end of the valve-chamber is closed by a removable plug 24. A port 25 is provided in the bushing midway between its ends and which opens from the valve-chamber into a horizontal passage 26, extending toward the This outer side of the valve-casing. A plug 27 screws into this passage from the exterior of the valve-casing and closes the same.

A bracket-arm 28 is cast integral with and extends laterally from the valve-casing, and

, said arm is provided with a horizontal passage 29, which extends at right angles to and communicates with the passage 26. These passages 29 and 26 are fluid supply passages through which the fluid to operate the motor passes into the valve-chamber 15, as will presently be described.

The valve-casingisprovided with an exhaust-passage 30, which extends from the two exhaust-ports 20 and 21 in the bushing inwardly toward a central branch 31, as seen in broken lines in Fig. 5, which latter communicates with an outlet-passage 32. A pipe 33 (see Figs. 1 and 2) is tapped into the side of the valve-casing at the passage 32 and carries off the exhaust.

A valve-stem 35 extends through a plugcap 36 in the upper end of the valve-casing and said stem passes down into the chamber, of the bushing 14. The lower end of this valve-stem is provided with annular recesses 37 and 38, with a circular shoulder 39 interposed between the two to prevent communication between the two. This stem serves as a slide-valve to govern the ports in the bushing.

The position of the stem in Fig. 5 is such as to permit the fluid, whether steam or water,

to enter the passage 26, pass beneath the shoulder 39, into the valve-chamber and around the annular recess 37 of the stem, through the bushing-port 16, and passages 18 and 8 into the lower end of the piston-chamber 5. The piston 6, as seen in Fig. 5, is therefore on its upward stroke to close the damper in the wellknown way. While the piston is thus making its upward stroke the pressure on the upper side must be relieved, and it will be noted that the exhaust in the piston-chamber from the upper side of the piston will be through passages 9 and 19, port 17 of the bushing, above the shoulder 39, into the upper side of the valve-chamber, out through port 21, into exhaust-passage to the branch 31, and from the latter through passage 32 into pipe 33. It will readily be understood how upon the shifting of the valve-stem the inlet and exhaust of the motive fluid will travel in the reverse direction from that just described.

The bracket-arm 28, into which the inletpassage 26 opens, has been described as having a lateral passage 29, through which the motive fluid passes to the valve-chamber. At the end of this passage 29 is a pipe 40, which communicates with the boiler, the illustration of which is notdeemed necessary, and atapered valve 41, having a passage 42, is fitted into a seat 43 in said arm, and this valve may be turned so as to entirely cut off the steam-pressure from the passage 26, as would be necessary in cases where it was desired to operate the motor by water pressure, which will shortly be explained.

Extending vertically from the arm 28 and between the valve 43 and steam-pipe is a tubular stem 44, having a central passage 45, the lower end of which communicates with the passage 29in the arm 28. The upper end of the tubular stem is provided with a cupshaped chamber 46, over which a cap 47 fits, and a diaphragm 48 is sustained in said chamber and supports a head 49. A stem 50 projects vertically from the center of the head 49 and passes through a vertical bearing 51 in the cap 47 and the upper projecting end of said stem contacts with the lower edge of a beam 52, which is pivotally sustained above the cap between two projecting flanges 53 on the top of the cap. A set-screw 54, directly over the stem, serves as a stop to limit the upward movement of the beam. 55, one on each side of the beam and extending through the flanges 53, serve to prevent lateral swinging of the beam when moving vertically. A post 56, also on the cap, has an adjustable stop to limit the downward movement of the beam. As shown in the drawings, the beam is partly elevated. The outer free end of the beam 52 carries a pendent rod 57, on which the usual pressure-regulating weights 58 are mounted to determine the maximum boiler-pressure.

By reference to Fig. 4 it will be seen that the lower end of the rod 57 is provided with a central cavity 59, in which a vertical pin 60 projects. This pin 60 is sustained by a horizontal stationary bracket 61, which projects from the bracket 1 and prevents lateral swinging of the pendent rod, such as would occur on board ship, and enables a nicety of adjustment that will maintain a uniform boilerpressure with a maximum amount of coal.

The beam 52 extends substantially horizontally above the valve-stem 35, and at a point immediately above the latter are two links 62, which are pivotally connected to the beam and hang pendently therefrom and in line with the stem. A threaded stem 63 is suspended by its upper end from the links 62, and the lower end of said stem screws into a coupling 64, which connects the stem with the valve-stem 35, so that the valve-stem will be pivotally connected to the beam 52. A sliding weight 65 is mounted on the beam between the links 62 and rod 57, and said weight serves the usual function of permitting a delicate adjustment to determine the boilerpressure to the fraction of a pound.

The upper end of the piston-rod 4 is provided with a yoke-head 66, to which suitable levers or flexible connections may be attached to operate the damper. It is immaterial how these connect-ions are made, as any of the well-known forms may be employed, and for this reason illustration is deemed unnecessary.

In the event it is desired to operate the motor by water-pressure instead of steam the valve 41 in the passage 29 of the arm 28 is turned to cut off the passage of steam to the valve, and the plug 27 on the exterior of the valve-casing will be removed and a watersupply pipe inserted to supply water under pressure to the passage 26. When this has been done, the conversion is complete.

It is obvious that the variations of boilerpressure will cause vertical movement of the diaphragm and beam, and the movement of the beam will impart a like movement to the Set-screws IIO valve-stem to permit the passage of motive -a diaphragm sustained by the extension of said arm and above the passage-way therein; a beam extending over the diaphragm, and means for connecting the beam with the valve.

2. In a damper-regulator the combination with a cylinder having an exterior valve-seat with ports and passages extending to opposite ends of the cylinder, of a piston in said cylinder; a valve-casing secured to said seat and having an integral arm which extends laterally from the valve-seat and which is provided with an integral extension adjacent its end, said arm and extension having passages which communicate with the ports in said seat; 'a valve in said seat; a diaphragm sustained by the extension; a valve in the arm between the seat and extension; a steam-supply pipe communicating with the passages in the arm and extension and between the valve and diaphragm; a beam coaoting with the diaphragm,

r and connections between the beam and valve in the seat.

3. In a damper-regulator the combination with a cylinder having a piston-chamber, an exterior seat and passages extending from the seat to opposite ends of the piston-chamber; a piston in said chamber; a valve-casing secured to the seat and having ports and passages communicating with the cylinder; an arm formed integrally with and projecting laterally from said casing and having a vertically-extending stem, said arm and stem having communicating passages; a steam-supply pipe communicating with the passage in said arm; a valve interposed between the passage in the arm and the ports in said valvecasing; a diaphragm at the upper end of the vertical stem; a beam pivoted adjacent said diaphragm and extending over the valve at the side of the cylinder, and means for pivotally connecting the beam with the valve.

4:. In a damper-regulator the combination with a cylinder having a piston-chamber and 'passages leading from opposite ends of the chamber and opening at the side of the cylinder, of a piston in said chamber and movable between the passage-openings; a valve-casing secured to the exterior of the cylinder at the outer end of said passage-openings and having passages communicating with the cylinder-passages. said casing also having a fluidsupply passage, 26, with a plug to close the end thereof; a valve in said casing between the fluid-supply passage and the passages in the cylinder; an arm formed integrally with and extending laterally from said valve-casing and having a steam-supply passage which opens into the passage, 26, of the valve-casing; a valve, 41, in the steam-supply passage; a stem formed integrally with and extending vertically from the arm and having a passage therein; a diaphragm at the upper end of said stem; a beam above the diaphragm and extending laterally above the valve, and a link connecting the beam and valve..

5. In a damper-regulator the combination with a cylinder having a piston-chamber with passages leading from opposite ends of said chamber, of a valve at the side of said cylinder and controlling said cylinder-passages; a fluid-operated beam above the valve and pro vided at one end with a pendent rod which latter has a recess in its lower end; means for pivotally connecting the beam and valve; a bracket at the lower end of said pendent rod, and a pin projecting from said bracket and into the recess at the lower end of the rod to prevent swaying ofsaid rod.

In testimony whereofI affix my signature in presence of two witnesses.

WILLIAM A. MURRAY.

Witnesses: 1

CHARLES B. MANN, J r., FELIX R. SULLIVAN. 

